Revised Ti-in-biotite geothermometer for ilmenite- or rutile-bearing crustal metapelites

被引：148

作者：

Wu, Chun-Ming ^{[1
]}

Chen, Hong-Xu ^{[1
]}

机构：

[1] Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China

来源：

SCIENCE BULLETIN | 2015年 / 60卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Ti content; Biotite; Calibration; Geothermometer; Application; Error; SOUTH-CENTRAL MAINE; GARNET; QUARTZ; GEOBAROMETER; METAMORPHISM; EVOLUTION; PETROLOGY; BELT; RECALIBRATION; ASSEMBLAGE;

D O I：

10.1007/s11434-014-0674-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In the present study, the Ti-in-biotite geothermometer was revised using more than 300 natural rutile-or ilmenite-bearing metapelites collected worldwide. The formulation was empirically calibrated as ln[T(degrees C)]= 6.313+0.224ln(X-Ti)-0.288ln(X-Fe)-0.449ln(X-Mg) + 0.15P (GPa), with X-j=j/(Fe+Mg+Al-VI+Ti) in biotite, assuming ferric iron content of 11.6 mol% of the total iron in biotite. This thermometer is consistent with the well-calibrated garnet-biotite thermometer within error of +/- 50 degrees C for most of the calibrant samples and can successfully distinguish systematic temperature changes of different metamorphic zones in both prograde and inverted metamorphic terranes as well as thermal contact aureoles. Thus, the thermometer truthfully reflects real geologic conditions and can be applied to TiO2-saturated metapelites metamorphosed at the crustal level within the calibration ranges (450-840 degrees C, 0.1-1.9 GPa, X-Ti = 0.02-0.14 in biotite).

引用

页码：116 / 121

页数：6

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